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Planning a whole-house audio system? Take a look at the SI-1230. You can customize this powerful 12-channel amp to best suit your specific multi-room setup. Enjoy warm stereo sound in six rooms, or combine two channels into one to give your speakers more juice — a great option for power-hungry outdoor speakers. Use a single channel of power for mono sound in smaller listening areas, like a closet or bathroom.

Enjoy music throughout your house
The '1230 can distribute music from one audio source, like a CD changer, to multiple rooms in your home. Or you can connect additional sources directly to the '1230 and assign each one to a single listening room. And by adding one or more preamps to your system, you can send additional sources to more than one listening room.

Serious whole-house audio power
This amplifier provides your system with an impressive amount of power for big, room-filling sound. Driven simultaneously, all 12 channels produce 30 watts RMS, or 360 watts total. "Bridging" or combining adjacent channels gives you 80 watts for each bridged pair, or 480 watts total.

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What's a 12 channel?!

From the title, you can see I'm not a tech-head. My home was pre-wired with multiple speakers and I needed something to power them. The Niles works well in all rooms and outdoors, including a room that doesn't have a volume knob. I adjusted that room's volume using the back knob--a huge plus for my situation.

Pros:Volume control for each channel on the unit

Cons:Would prefer flip connections to the screw in for bare-wire install. And how about making the on switch a different color? Unit is in AV closet, so not well-lighted.

Awesome Amp

To the person who said this is a Not So Great amp, this person obviously does not know how to install the amp, is using poor speakers, poor wiring, poor volume control switches or both. A chain is only as strong as it's weakest link. I outfitted my home one year ago using Niles volume control, Audio Quest wiring, and Polk Audio speakers. The sound is AWESOME at all levels, and everyone that comes into my home wants the same setup in their home. I just purchased my second AMP to install in my sister's home and she and her husband love the sound in my home. Bottom line, don't take advice from an idiot.

Not so great

After hearing such great reviews about this amp, the amp is a huge disappointment. I have had two and must say they do not act like a 30 watt amp. first the treble is way to high in comparision to other amps. There doesn't appear to be any lows with that said I'm figuring that it is just way under powered for what I am trying to push which is about ten polk audio speakers. one would think with a 12 channel amp it would be able to do that but the power just isn't there. Very disappointed.

Pros:has banana plugs for easy install. Long warranty but with this terrible of a sound coming out of the box why would you want to keep it.

Incredible multi-room amp

Written By Timothy, Rochester Hills, MI on Saturday, February 12, 2005

This is a high-quality piece of electronics. Huge toridal core transformer, 12 channels bridgable to 6 channels, tremendous current capacity, large, solid binding posts, there is just nothing not to like about this amplifier. Paired with the 4.6ci, it gives you a top-of-the-line multi-room system.

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Features

Twelve to Six channel
configurable power: Each of this unit's six adjacent
output pairs are bridgeable, allowing you to create up to six 80 watt
channels. This allows you to allocate more power to specific locations
such as large rooms or outdoors.

BusMatrix selector: Allows you to
assign each channel to a common left, right or mono signal bus or to a dedicated
signal input. This makes this an ideal unit for multi-room or multi-zone
systems.

Independent level controls: Each
channel has its own level control allowing you to limit the output and to
precisely match the amplifier to the rest of your system.

Three turn-on modes: Three
turn-on modes allow you to interface with any kind of system and have the
amplifier automatically turn on.

Automatic thermal and short circuit
protection for each channel: If there is a problem with one channel
the other channels can continue to play.

Control Output: A 12 volt DC
output allows you to operate voltage-triggered devices such as motorized
screens and curtains.

Connections

Power LED: Illuminates in red when
the unit is connected to AC and the master power switch is on.

Active LED: Illuminates in red when
the amplifier circuitry is turned on by the turn on circuits.

Protect LED: Illuminates in red when
the unit is in a fault condition (D.C. output).

Rear panel:

Turn-on mode switch: Allows you to
select one of three modes. Constant mode defeats the turn-on circuitry
and the front panel master power switch turns the unit on and off.
Audio sense mode turns the amplifier off when no audio signal is present for
two minutes and on whenever an audio signal is present (it turns on the
adjacent pair of amplifier channels that have a signal present, such as 1
and 2 . 3-30 volt AC/DC Trigger mode turns the unit off when no AC or
DC voltage is detected at the trigger input and turns on all adjacent
channel pairs when a voltage and a line level audio signal is detected at an
adjacent channel pair.

3-30V AC/DC trigger input: 3.5mm
female jack for voltage input. If a unit which outputs 3-30V AC or DC
voltage is connected to this input and the turn-on mode is set to Trigger
mode the unit turns on when it detects the signal and turns off when the
signal stops. Voltage triggers are supplied by some Niles automated
switchers, some video projectors or even a 16 volt Niles AC wall adapter
(Niles XF00008).

12 volt control output: Female 3.5mm
jack. This jack provides a 12V DC signal used for triggering Niles
automated switchers, some motorized screens, curtains, etc. When the
amplifier is turn off this jack stops sending out the 12V DC
signal.

Main Bus input: Gold plated RCA
stereo input. This signal can be routed to any of the twelve channels using
the DIP switch found on each channel.

Cascade bus output: Gold plated RCA
stereo output (marked Cascade output) which allows you to daisy chain
multiple amplifiers. This output is not buffered so if you want to
chain more than 5 amplifiers a buffered distribution amplifier like the
Niles ADA-6 is needed.

Independent level adjustment rotary
knobs: Allow you to preset the maximum system volume or match levels with
another amplifier for each of the twelve channels.

Bridge switches: Six switches allow
you to bridge adjacent amplifier channels to create up to 6 bridged
channels. Note that minimum speaker impedance in bridged mode is 8
ohms.

BusMatrix control switches: 12 4-pin
DIP switches (one per channel) allows you to assign a particular source to
each channel. You can select the signal from the main Bus input and
select either Left, Right or Mono (left and right) or you can select the
signal going to that channel's dedicated input. Note that only one
signal source should be selected per channel.

Individual input jacks: 12
gold-plated RCA jacks, one per channel.

Speaker outputs: Left and Right
Binding posts for 12 channels (not five-way due to a metal collar) accept up
to 12 gauge bare wire or banana plugs.

Notes

The manual recommends at least 5"
of free air space above the chassis and that, if the unit is placed in a
cabinet, that the rear of the cabinet be opened.

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team. They verify what’s in the box, check the owner's manual, and record
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